Question

$3 \: \: \: \: \: \: \: \: \:\: \: \: 0.1\\ - - x - - \\ 5 \: \: \: \: \: \: \: \: \: \: \: \:$
Alguem pode ajudar ​

Answer 1

Vamos lá.

3/5 - x - 1/10 = 0

6/10 - x - 1/10 = 0

x = 5/10 = 1/2

Answer 2

$\large\sf{} \dfrac{3}{5} - x - \dfrac{1}{10} \\ \\\large\sf{} \dfrac{6 - 1}{10} \\ \\\large\sf{} \dfrac{5}{10} \\ \\ \large\sf{} \dfrac{5 \div 5}{10 \div 5} \\ \\ \large\sf{}{\large\boxed{\boxed{  { \large \sf \dfrac{1}{2} - x }}}}$

${\large\boxed{\boxed{  { \large \sf Bons~Estudos }}}}$